MySQL到JSON - 结合两个查询/格式

时间:2016-11-17 18:30:19

标签: php json

我使用PHP / MySQL运行查询并将其编码为JSON,但我不确定如何将JSON转换为我需要的形式。

这是我的PHP:

$myquery1 = "select 'links' as type, source, target, value from table";

$myquery2 = "select 'nodes' as type, name from table2";

$query = mysql_query($myquery1);

if ( ! $query ) {
    echo mysql_error();
    die;
}

$data = array();

for ($x = 0; $x < mysql_num_rows($query); $x++) {
    $data[] = mysql_fetch_assoc($query);
}

//(and again for myquery2)

echo json_encode($data); //not sure how to combine queries here

我希望将JSON分组为&#34; type,&#34;像这样:

{
 "links": [{"source":"58","target":"john","value":"95"},
           {"source":"60","target":"mark","value":"80"}],
 "nodes": 
          [{"name":"john"}, {"name":"mark"}, {"name":"rose"}]
}

非常感谢任何帮助。谢谢!

1 个答案:

答案 0 :(得分:3)

你可以这样做:

$data = array(
    "links" => array(),
    "nodes" => array()
);
..
// for each link
$data["links"][] = mysql_fetch_assoc($query);
..
// for each node
$data["nodes"][] = mysql_fetch_assoc($query);

我认为mysql_fetch_assoc每列添加两次,一次按其名称添加,一次按其索引,因此您需要进行一些修剪。即:

$row = mysql_fetch_assoc($query);
$data["links"][] = array(
    "name" => $row["name"],
    .. etc
)

在for循环条件下执行mysql_num_rows($query)可能是个问题。值永远不会改变,但PHP必须在每个循环中运行该函数。缓存该值或使用:

while (($row = mysql_fetch_assoc($res)) !== false) { .. }